Directional locking reverse shoulder prostheses and systems

US10709565B2 · kind B2 · utility

Assignee

• Zimmer, Inc. · US

Inventors

• Steven Humphrey · Warsaw, US
• James D. Wernle · Warsaw, US
• Joanna L. Surma · Winona Lake, US
• Stephen H. Hoag · Warsaw, US
• Donald W. Dye · Pflugerville, US
• Kenton A. Walz · Fort Wayne, US
• Terry W. Wagner · Mishawaka, US
• Kathleen Macke · Warsaw, US
• Duane Gillard · Pierceton, US
• Brian D. Byrd · North Webster, US
• Ken Yamaguchi · Fuchu, JP

Key dates

• Filing date: Aug 26, 2016
• Grant date: Jul 14, 2020
• Expiry date: Aug 26, 2036

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2002/4085
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The present disclosure relates to prosthesis systems having trays and liners having an asymmetrical locking mechanism to bias the strength of the liner to resist loading forces and associated methods. The tray has a lateral groove disposed in an inner surface of a lateral circumferential portion of the tray and a medial groove disposed in an inner surface of a medial circumferential portion of the tray. The liner has an upper segment and a lower segment. The liner has a locking portion for lockingly engaging the tray that includes the lower segment. The locking portion has a lateral toe positioned generally diametrically opposite a plurality of resiliently deformable medial fingers defined therein. The liner and the tray are engageable in a lateral-to-medial direction so that the plurality of medial fingers can resiliently deform to engage the medial groove subsequent to engagement of the lateral toe within the lateral groove.